US4017969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting instrument
Assignee: Individual
•
Filing: 1976-04-20
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Granted: 1977-04-19
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Expires: 1996-04-20
Abstract
Abstract This invention comprises a foldable knife, having replacement blades contained pivotably within a case in one position and extending outwardly therefrom in a second position. Thus the invention is comprised of a case, a rotable blade holder pivotably attached to said case, the blade holder adapted to receive a sharpened blade, a slideable ejector rod positioned in said case, and upon a blade track, adapted to eject the blade from said blade holder when the blade holder is in the outward extended position. This ejection is done by pressing an ejector button attached to said ejector forward with the fingers. A blade lock member is spring biased against the cammed end portion of said blade holder whereby the blade holder is held securely by a cam in its outward extended position.
Inventors
- 👤 Robert E. Stonebraker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:40
CPC Classifications
B; B26; B26B; B26B1/00; B26B1/02; B26B1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
169 words
A cutting instrument comprising in combination: A case having a track groove on one side thereof; A blade pivot rotably attached to said case; A blade holder having a blade track integrally attached to said blade pivot and adapted to receive a blade, said blade pivot being generally circular in shape with a flat cam surface thereon; A blade slidably positionable upon said blade holder; An ejector rod positioned within said case and aligned with said blade track when the instrument is in its open position; An ejector button integrally attached to said ejector rod and extending through said track groove to the outside portion of said case; A blade lock member positioned within said case and against said blade pivot; A blade lock spring attached to said case and biasing said blade lock member against said blade pivot; A stop member integrally positioned on said case at the end of said track groove and adapted to stop said ejector button when it is slid up said track groove.
Claim 2
Dependent Claim
169 words
A cutting instrument comprising in combination: A case having a track groove on one side thereof; A blade pivot rotably attached to said case; A blade holder having a blade track integrally attached to said blade pivot and adapted to receive a blade, said blade pivot being generally circular in shape with a flat cam surface thereon; A blade slidably positionable upon said blade holder; An ejector rod positioned within said case and aligned with said blade track when the instrument is in its open position; An ejector button integrally attached to said ejector rod and extending through said track groove to the outside portion of said case; A blade lock member positioned within said case and against said blade pivot; A blade lock spring attached to said case and biasing said blade lock member against said blade pivot; A stop member integrally positioned on said case at the end of said track groove and adapted to stop said ejector button when it is slid up said track groove.
Claim 3
Dependent Claim
22 words
The combination as claimed in claim 1 in which said blade lock member is attached to the interior portion of said case.
Claim 4
Dependent Claim
31 words
The combination as claimed in claim 2 in which a pivoting member extends through said case and through said blade pivot, whereby said blade pivot may pivot about said pivoting member.
Claim 5
Dependent Claim
33 words
The combination as claimed in claim 3 in which said track groove and blade track extend diagonally with respect to a side of said case when the instrument is in its open position.
Claim 6
Dependent Claim
39 words
The combination as claimed in claim 4 in which said blade holder is comprised of in combination: A blade-retaining member positioned on the end portion of said blade holder and adapted to retain said blade within said blade holder.
Claim 7
Dependent Claim
23 words
The combination as claimed in claim 5 in which said case is generally rectangular in shape, having an interior and exterior portion thereof.
Claim 8
Dependent Claim
41 words
The combination as claimed in claim 6 in which said blade is comprised of in combination: A cutting member; A flange member integrally attached to the edge portion of said cutting member; Said flange member adapted to engage said blade holder.
Claim 9
Dependent Claim
34 words
The combination as claimed in claim 7 in which said blade holder is comprised of two tracks in a general parallel position to one another and adapted to receive flange member of said blade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |